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Aquatic Habitat

in what form ...

Question

in what form marine animals utilise carbon dioxide in making shells?(in short 1mark)

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Solution

To build shells marine animals extract calcium inon (Ca^₂+) and Carbonate ions (CO₃^2-) from sea water combining them into calcium carbonate (CaCO₃).

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Consider the following statements regarding the ways in which carbon dioxide is “fixed” and choose the correct option.

1. Green plants convert carbon dioxide into glucose in the presence of sunlight.

2. Marine animals use carbonates dissolved in sea water to make their shells.

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